which event occurs during
interphase?
a. The cell grows.
á Centrioles appear.
c. Spindle fibers begin to form.
do Centromeres divide.
The event that occurs during interphase is: A. The cell grows.
What is interphase?Interphase is a stage in the cell cycle that occurs before cell division. It is a period of growth, preparation, and DNA replication that happens in between cell divisions. Interphase is the longest phase of the cell cycle and can be divided into three distinct stages: G1 (Gap 1), S (Synthesis), and G2 (Gap 2).
In the S phase, DNA replication takes place. The cell's genetic material, in the form of chromosomes, is replicated to produce identical copies. Each replicated chromosome consists of two sister chromatids held together by a centromere.
Option A is actually the correct answer.
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Which hormones most directly influence the uterus during pregnancy
Estrogens, progesterone, and human Chorionic Gonadotropin (hCG) are the main hormones that influence the uterus during pregnancy. First released by the corpus luteum, these hormones stimulate changes that nourish the embryo and maintain the pregnancy. As the gestation advances, the placenta takes over the secretion of these hormones, which continue to play vital roles in the healthy progression of pregnancy.
Explanation:The hormones that most directly influence the uterus during pregnancy are primarily estrogens, progesterone, and human Chorionic Gonadotropin (hCG). These hormones are firstly secreted by the corpus luteum during the initial weeks of pregnancy, resulting in the generation of decidual cells that nourish the early stage embryo, or blastocyst, before the placenta forms.
As the gestation progresses, the placenta becomes the primary endocrine organ, taking over the role of hormone secretion from the degenerating corpus luteum. Estrogen, progesterone, and hCG secreted by the placenta are responsible for most of the changes experienced during pregnancy.
For instance, estrogen mainly maintains the pregnancy and promotes fetal viability while also stimulating tissue growth in both the mother and fetus. Progesterone, on the other hand, prevents new ovarian follicles from developing and suppresses uterine contractions, protecting the developing fetus.
Lastly, hCG promotes the survival of the corpus luteum, stimulates the male fetal gonads to secrete testosterone necessary for the development of the male reproductive system, and ensures the placenta continues to secrete progesterone crucial to maintaining the pregnancy.
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5.1.4 Quiz: Carbon and Nitrogen Cycles
Question 2 of 10
2 Points
What happens to most of the nitrogen in a plant when the plant dies?
O
A. It remains in the dead plant.
B. It moves into the atmosphere.
O
O
C. It goes back into the soil.
D. It is absorbed directly into animals.
Answer:
The correct answer is -It goes back into the soil.
Explanation:
Nitrogen is found in a wide variety in the atmosphere. It can be found in a form of ammonia,nitrate, nitrite, nitrogen dioxide, nitric oxide etc.After the death of a plant or animal body, the organic form of nitrogen is converted to ammonium by the microorganisms and this process is called as ammonification.Enzymes that are required for this conversion are GDH, Gln synthetase etc.This law states that plants and animals evolve in a consistent
sequence
Answer:
Of the sun and oxygen
Explanation:
After you have established a research question, which of the following should you do first?
1. design an experiment
2. put your research question into a null and alternative hypothesis
3. determine the variables you will measure
4. choose a statistical test to use
Answer:
After you have established a research question, which of the following should you do first?
put your research question into a null and alternative hypothesis
Explanation:
It expedient that after research question has been established, one needs to make a null hypothesis and alternate it, this gives a clue of what the researcher intends to find or problem to be solved.
Which of the following would be a reason for species to undergo cyclic population changes?
Answer:
"The vegetation it eats increases and then decreases repeatedly with changing seasons" would be a reason for species to undergo cyclic population changes.
Explanation:
A keystone specie corresponds to an organism species which has disproportionately high environmental effects relative to its abundance or population.Many living organism population typically undergo cyclical shifts in size of population.
Cyclic oscillation leads to regular decline and fall across time in the population size of the living organism concerned.The cyclical population shifts are sometimes triggered by relationships between different organism populations. Disruptions in food availability, for an instance, may bring about cyclical shifts in population.
The end of life for a group of organisms, usually a species, is called a what?
The end of life for a group of organisms or a species is known as extinction. This usually happens due to changes in environmental conditions or during a mass extinction event. An example of mass extinction is the 'great dying' at the end of the Cretaceous period, which marked the end of the dinosaur age.
Explanation:The end of life for a group of organisms, usually a species, is referred to as extinction. Extinction is a natural part of macroevolution, indicating evolutionary changes above the species level. There are numerous causes of extinction, which often involve alterations in environmental conditions or mass extinction events.
A mass extinction event refers to a sudden, drastic reduction in biodiversity brought about by an extraordinary environmental condition that wipes out the majority of species within a relatively short geological time period. Great examples of mass extinction are the end of the Cretaceous period, often known as the 'great dying', which marked the end of the dinosaur age, and the current high rate of extinction, considered 500-1000 times the normal rate, largely caused by human activities.
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Diatoms and dinoflagellates have a variety of shapes. Why is their shape an adaptation for staying afloat as a phytoplankton?
Answer:
All species of plankton have certain characteristics in their shape which allows them to float in the water column. They have features such as stored fats, lateral spines, oil droplets etch which allow them to float in water. Almost, all of the diatoms and some species of the dinoflagellates are capable of carrying out the process of photosynthesis. Hence, these organisms are capable of making their own food.
Final answer:
Diatoms and dinoflagellates have adapted shapes that help them stay afloat in water. Diatoms form complex colonies, while dinoflagellates have cellulose armor and flagella for buoyancy and mobility. These adaptations ensure they remain in habitats conducive to their survival and roles as key components of the aquatic food web.
Explanation:
The variety of shapes found in diatoms and dinoflagellates serve as adaptations for staying afloat as phytoplankton. Diatoms, for instance, form colonies in shapes like stars and spirals, facilitating easier floating in the water column through raft-formation and making it harder for predators to engulf them. Dinoflagellates, characterized by their cellulose armor and two flagella that produce a spinning motion, enhance their buoyancy and enable their persistence in various marine and freshwater habitats. The interlocking plates of cellulose and the action of the flagella not only contribute to their floatation but also add to the diversity in morphologies that prevent them from sinking, ensuring they remain in light-rich, upper layers of water essential for photosynthesis.
scientific name for alkaliphiles
Answer:
Alkaliphiles are a class of extremophilic microbes capable of survival in alkaline (pH roughly 8.5–11) environments, growing optimally around a pH of 10.
Answer: Alkaliphiles are a class of extremophilic microbes capable of survival in alkaline (pH roughly 8.5–11) environments, growing optimally around a pH of 10
Explanation:
Describe the three parts of an ATP molecule.
Answer: Atp stands for adenosine triphosphate. Its a molecule made in every cell of your body. It has three phosphates attached to it and the bonds of these phosphates are a large amount of chemical energy. For every single chemical process in your body that requires energy the cdllx of your body will break your bond between one of the phosphates.
Explanation:
Final answer:
ATP consists of three parts: adenine, a nitrogenous base; ribose, a five-carbon sugar; and three phosphate groups that store energy. The high-energy bond between the last two phosphates is broken to release energy for cellular processes.
Explanation:
Adenosine Triphosphate (ATP) is a complex molecule that serves as the primary energy carrier in the cell. The three parts of an ATP molecule include:
Adenine - a nitrogenous base imperative for the structure of ATP.Ribose - a five-carbon sugar that serves as the backbone to which the adenine and phosphate groups are attached.Three phosphate groups - referred to as alpha, beta, and gamma phosphates, these groups store the potential energy that is released during cell metabolism.The bond between the last two phosphate groups, beta and gamma, is known as a high-energy bond that, when broken, releases energy for cellular activities. This process is known as hydrolysis. The energy released is then used in various cellular processes, including muscle contraction and the synthesis of biomolecules.
What kind of stem cells can develop into any kind of cells in the human body or
the placenta?
A. Pluripotent stem cells
B. Totipotent stem cells
C. Multipotent stem cells
D. Unipotent stem cells
Answer:
a
Explanation:
pluripotent stem cell
Answer:
pluripotent stem cell
Explanation:
Ape-x
How many hours are between lunch and dinner at 6:00?
Answer:
That number of hours between lunch and dinner varies between individuals.
If dinner is at 6:00 pm, and lunch is at noon (12:00 pm) then there are 6 hours between lunch and dinner
Explanation:
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Bacteria are the most common example of exponential growth. Select a number
between 2 and 10 to represent the hourly growth rate of a certain bacteria. For
example, selecting the number 8 would mean that the amount of bacteria will be 8
times greater after every hour.
In simple terms, Bacteria can be stated a large group of single-cell microorganisms and they can easily found everywhere which lack nucleus and organelles
Explanation:
The Bacterial growth can be stated as the multiplication of bacteria into two daughter cells and this process is stated as binary fissionIn simple terms, the exponential growth or rate of a bacteria is stated as the generation timeMostly bacteria will grow based on factors like air, temperature, etcFor example, E.coli takes around fifteen to sixteen minutes for growth and the bacteria coliform takes around twelve to twelve four hours depends upon the factorsFrom single cell of bacteria the number becomes, 2, 8, 64, ... and so on.
Explanation:
Bacteria is one of the best examples that show exponential growth.
The equation that shows the exponential growth of bacteria is
N = N₀ X 2ⁿ
If we consider the growth of the bacteria starts from 1 cell then,
N = 1 X 2⁰
N= 1
In 1 hour, the cell number becomes,
N = 1 X 2¹
N = 2
In 2nd hour, the cell number becomes,
N = 2 X 2²
N = 8
In 3rd hour, the cell number becomes,
N = 8 X 2³
N = 64
The growth continues exponentially and then becomes stationary after a certain period of time when enough nutrients are not present.
Thus from single cell of bacteria the number becomes, 2, 8, 64, ... and so on.
Within any large animal population, there is _______ a variety of traits.
And between different animal populations, there is _______ a variety of traits.
A.
never; sometimes
B.
sometimes; sometimes
C.
never; always
D.
always; always
Answer:
D. Always;Always
Humans and hogs have differences in only 1 out of the 51 amino acids in their insulin proteins. Hogs and guinea pigs have differences in 17 out of the 51 amino acids in their insulin proteins.
What can be inferred from this information?
A.
Hogs and guinea pigs are more closely related to each other than either is to humans.
B.
Hogs are related to humans but not to guinea pigs.
C.
Humans are more closely related to hogs than hogs are to guinea pigs.
D.
Humans are related to guinea pigs but not to hogs.
Humans are more closely related to hogs than hogs are to guinea pigs.
Explanation:
The difference in the amino acid sequence of a protein is used to know the relation between organism i.e. how closely they are related.
It is known that proteins are the result of DNA sequence ie genes of the organism.
The gene or protein is compared between organisms to understand the evolutionary evidence and similarities between them.
The less is the difference the more is the two organisms closely related as in the case of hog and human which have only 1 amino acid difference in their insulin enzyme. While guinea pig is having a difference of 17 amino acids so it is expected to be distantly related.
These relations helps the scientist to resolve the issues of crisis say insulin. They zero out the possibility of extracting the enzyme genes of possible organism and increase the yield.
Answer:
c
Explanation:
the terms germ and microbe are often used interchangeably. what comes to mind when you hear the word germ
Answer:
Most times when you think of the word germ you think of bacteria when i truth only a small fraction of bacteria are harmful a larger fraction is the ones that help organism such as for plants their are bacteria the eat nitrogen when the plant cant deal with nitrogen.
Explanation:
I hope this helps you other forms of germs can be virus but that is not the image you tend to think of when you here the word germ you think of a self living organism not a thing thats not even alive.
2.
Which chemical equation represents a decomposition reaction?
A. Ba + S + Bas
B. CHgO → Hg + 30,
C. 2FeO + C + 2Fe + CO,
D. Sil, + 2Mg → Si + 2MgI,
Answer:
The correct option is B) CHgO → Hg + 30
Explanation:
A decomposition reaction can be described as a type of reaction in which a single compound or fragment breaks down into two or more than two entities.
The reaction mentioned in option B depicts a decomposition reaction:
CHgO → Hg + 30
In this decomposition reaction, CHgO is the compound which is being broken down into the elements Hg and O.
Match each description with correct process.
A) occurs only in cells containg chlorophyll F)CO2 and H2O are reactants
B)Carried ob by cells G) Does not need light
C) Produces energy H) Occurs in Mitochondria
D)Produces carbhydrates (sugars) I) Occurs in heterotrophs
E) CO2,H2O, and ATP are products J) Breaks bonds between phosphate
Explanation:
Match each description with correct process.
A) occurs only in cells containg chlorophyll : photosynthesis
B)Carried ob by cells : all metaboilc reactions
C) Produces energy : mitochondria
D)Produces carbhydrates (sugars): Dark reaction
E) CO2,H2O, and ATP are products : Respiration
F) Co2 and H2O are reactants : photosynthesis
G) Does not need light : respiration
H) Occurs in Mitochondria : chemical reactions that produces energy
) I) Occurs in heterotrophs : Parasitism
J) Breaks bonds between phosphate: an enzyme
Cystic fibrosis is a generic disorder
Answer:
If this is a question then yes. It is.
Explanation:
Cystic fibrosis is a inheirited or genetic disorder in the lungs.
Answer:
yes it is
Explanation:
The different forms of a gene are called _____. A. nucleotides B. chromosomes C. alleles D. traits
Answer:
Alleles
Explanation:
Nucleotides are units of DNA. Chromosomes hold long stands of DNA. Traits are features expressed because of certain genes.
Answer:C. alleles
Explanation: Alleles are different form of a gene. Example gene Aa controlling tallness consist of two alleles A and a although the two allele are a gene but in different form.
I really need help someone help me ASAP!!!!!
(the image shown has been resized to fit)
(20 points)
A.
Particle W
B.
Particle X
C.
Particle Y
D.
Particle Z
Answer: particle Y
Explanation:
Answer:
Particle Z
Explanation:
That is a valence electron which determines the reactivity. It is in its outermost shell that is why if you need to show work ^-^
When did the ocean become an important area of study?
A. about 1,000 years ago
B. about 500 years ago
C. about 2,000 years ago
D. about 200 years ago
Give two reasons why both men and women could become victims of violence
Answer:
It could be that the individual (male or female) has a high sense of vulnerability
And
The victim is known to be associating with the wrong peers
Explanation:
For questions 1-5, complete each statement by writing the correct word or
words.
1. The building blocks of DNA are
2. Nucleotides in DNA are made of three basic components: a sugar called
, and a nitrogenous
3. DNA contains four kinds of nitrogenous bases:
, and
4. In DNA, can be joined in any order.
5. The nucleotides in DNA are joined by
bonds.
Prompt 1 Example: One characteristic of a stable society is ________. This is because _________. Another Characteristic is _________. This characteristic shows that the society is stable because _________.
Prompt 2 Example: Energy and economic development are related through ___________. This is because ____________.
Prompt 3 Example: One benefit of biotechnology is __________.This is because _______. Another benefit is __________. because it _________.
Explanation:
Prompt 1: One characteristics of a stable society is Cooperation.
This is because if there is no cooperation among the members of the society, then members cannot live happily in society.
Another characteristics is Interdependence.
This characteristic shows that the society is stable because it is not possible for human being to fulfill his need in isolation. Here, Society plays an important role, It fulfills the needs of the people living in society. Thus, this makes a society stable.
Prompt 2: Energy and economic development are related through growth. This is because the economic inputs such as labor, capital etc. and energies such as oil, coal etc are converted into economic outputs such as manufactured goods or products which leads to the growth of the organization.
Prompt 3: One benefit of biotechnology is that it increases farmers yield.
This is because more food is grown in less land. Soil conservation is improved by the farming technique. Plants are insect resistant.
Another benefit is it can reduce the rates of infectious diseases.
Vaccines are created with the help of Biotechnology to cure infectious diseases. It allows us to know how infectious diseases are transmitted so as to inhibit their transmission.
a. What are at least 3 advantages of returning the forest along Lake Superior to what it was like in its natural state, 150 years ago?
In simple words, the forest can be stated as the opaque growth of tree covering the large area and it has lots of uses.
Explanation:
Forest help us to maintain the ecological balance. In earlier days, forest acts as a source of the medicine.It maintains the land and prevents soil erosion. The forest produces an enormous amount of oxygen and plays a role in climatic change.It plays a role in ecological functions and social and cultural benefits. The largest forest in the world is the Amazon forest which covers 2.2 million square miles.A student observed several slides with different cell types under a microscope. What's Pair slides contain cells that result from meiosis.
Answer:
2.3.4
Explanation:
2.3.4
Final answer:
Slides showing cells from meiosis will depict stages where chromosome number is halved, with key events like crossing over occurring in prophase I and independent assortment during metaphase I. These processes are evident in other slides at various meiotic stages and can be further understood with interactive animations.
Explanation:
The slides that contain cells resulting from meiosis will show various stages of cell division where the ploidy changes from diploid (2 sets of chromosomes) to haploid (1 set of chromosomes).
This reduction in chromosome number occurs during meiosis I, specifically in the transition from telophase I to cytokinesis, resulting in two haploid daughter cells. During meiosis II, these haploid cells will undergo a division similar to mitosis to produce four genetically unique haploid cells.
Key processes like crossing over and independent assortment contribute to genetic diversity and occur during prophase I and metaphase I, respectively.
Crossing over involves the exchange of genetic material between non-sister chromatids of homologous chromosomes, which can be seen under a microscope as chiasmata. Independent assortment is the random distribution of homologous chromosome pairs to daughter cells.
To visualize these processes using a microscope, you could examine Lilium anther slides during different meiotic stages, draw and label each phase, and note where crossing over or independent assortment occurs.
The observation of homologous chromosomes aligning and separating during the meiotic stages can be further explored through interactive animations focusing on the meiosis process.
10. What does the word competition mean in biology?
A. Two or more organisms looking for the same resource
B. Organisms from different species looking for the same resource
C. Organisms from the same species looking for the same resource
D. Adults outcompeting offspring for resources
Answer:
B
Explanation: For example lions and cheetahs need similar resources so they compete with each other.
The the word competition mean in biology is C. Organisms from the same species looking for the same resource**.
What does the word competition mean in biology?Competition in biology is the interaction between organisms that are competing for the same limited resources. These resources could be food, water, space, or mates. Competition can occur between organisms of the same species or between organisms of different species.
When competition occurs between organisms of the same species, it is called **intraspecific competition**. Intraspecific competition can be very intense, as the organisms are very similar and have the same needs. For example, two male lions competing for the same female lion are engaging in intraspecific competition.
Competition is an important part of the natural world. It helps to regulate populations and ensures that the strongest and most adaptable organisms survive.
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I need help with my homework that is due tomorrow and I can not find the answers in the book or online.
Animal regeneration can produce whole organism or parts of organism and repair injury.
Clones today are done at genetic level by using molecular biology techniques as compared to old days when only nucleus would be removed from the egg cell and desired nucleus is inserted for cloning.
Explanation:
Regeneration is a process in which whole organism or part of which is produced from pre existing cells or group of cells and tissue. Regeneration helps in maintaining the integrity of morphology and physiology.
In lower animals like hydra and planaria whole organism is generated by existing parts. This process is termed as totipotency.
In higher animals however injury repair by mitosis is an example of regeneration.
Plant structure involved in vegetative propagation are: bulbs, rhizomes and tubers.
Vegetative propagation can be done by grafting, cutting, bulb formation, tuber, layering and tissue culture methods.
Cloning is a process in which a genetical or identical copy of an organism or the cell is made by molecular biology techniques. The use of DNA sequences, molecular scissors, stem cells and plasmid are the latest techniques of cloning.
Cloning is used for treating serious diseases as diabetes and heart injury.
In old days one cell would have its nucleus removed and placed into the egg and eventually organism produced
Advantages of tissue culture:
From a single explants, large number of plants can be made.
Obtaining plants of desired trait from tissue culture is easy in short span.
No seeds are required for the growing of new plants.
translate dna into mRNA
Answer:
Transcription
Explanation:
This is the process by which the information contained in the DNA is copied by base pairing to form a strand of ribonucleic acid called messenger RNA. During transcription, the portion of the DNA with the organic bases required for the synthesis of the required protein open up. Free RNA nucleotides align opposite one of the chains in a complementary relationship. Guanine of RNA pairs with cytosine of DNA. Adenine of RNA pairs with thymine of DNA while uracil of RNA pairs with adenine of DNA.